Brake-shoe.



O. W. ARMBRUST. I BEA o. Patented Nov. 28, 1911.

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Patented Nov. 28, 1911.

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BRAKE-SHOE.

Specification of Letters Patent.

ltatenteill Nov. 28, 19111.

Application filed December 2, 1910. Serial No. 595,184.

I To all whom it may concern:

I to the brake head by means of the key so that, .in event of fracture of the shoe, the partswill be held together in pro er position for engaging the wheel an will be prevented from falling on the track.

In the accompanying drawings Figure 1 is a side view, partly in section, and Fig. 2 is a back view of a common cast, iron shoe embodying the invention. Fig. 3 is a side view and Fig. 4. is a back view, both partly in section, showing the invention embodied in a shoe having an integral strengthening strip. Fig. 5 shows' the fastening key.

Figs. 6, 7 and 8 are respectively side,baok

and end views of a portion of a brake shoe embodying the invention in another form. Figs. 9, 10 and 11' are similar views illustrating another embodiment of. the invention.

I have shown the invention embodied only in several difierent formsofa solid cast iron car shoe but it will be readily understood by those skilled in the art that the invention may be embodied in composite and other car land t the guide lugs of the shoe. In-Figs.

1 and 2 the 'shoe corresponds to the most common type of solid cast iron shoe in commercial use and in Figs. 3 and 4 the shoe is provided with an integral strengthening strip 5 which extends from end to end of theshoe. In Figs. 1 and 2 I, rovide openings- 6 which extendthrough the guide and end lugs to receive the key '7-."""'In Figs. 3 and 4 the openings 8 not only extend through the. guide and end lugs but also through a portion of the strengthening strip 5.

In practice the shoe is secured to the head by the key'in'the usual manner except that the key is seated in the openings 6 as well vas in the opening 8 in the attaching lug. The key has ahead 9 of suitable character at one end and its other end is provided with .a pair of prongs 10 adapted to spring laterally into locking egagement with the shoe after it hafs been passed through one of the openings 6. Thus the shoe is connected at both ends as Well as at its middle to the head and if the shoe should fracture'in service the'portions thereof will beretained in place on the head and prevented from falling upon the track. The broken shoe may be continued in service while the par-ts thereof are thus held together by the fastening key which will not only hold the' parts on the head but in proper relation to each other in the case of ordinary fractures,

In Figs. 6, 7 and 8 I have shown a shoe provided at its end with a wire eye 11 to receive the ends of the key, the wire being embedded in the body of the shoe beneath the end lug. In Figs. 9,10 and 11 I have shown aneye 12 made integral with the shoe and projecting outward from the back thereof at the endings to receive the ends of the key.-. These figures also show the strengthening strip 5 and spacing lugs 13.

In all the several forms of the invention the key is engaged with the body of the shoe at the extreme ends thereof as well as at the attaching" lug midway betweenits ends and this is a matter of importance because the key securely fastens the ends of the shoe to the .head and avoids the liability of any portion of the shoe being broken ofi" and falling upon the track.

on its head and openings in said guide lugs and extending into the body of the shoe to receive a fastening key.-

' 2. A brake shoehaving an integral strengthening strip at its back extending longitudinally ofthe shoe and openings at the end of the shoe to receive the fastening key. I n

3. A brake shoe having a central strength ening strip and provided on its back with guide lugs and end lugs located outside the guide lugs, said end lugs having perfora- {ions therethrough to receive a fastening cey.

4. A brake shoe having an integral strengthening strip at its back extending longitudinally of the shoe and openings extending through the ends of said strengthening strip to receive the fastening key.

CHARLES W. ARMBRUST.

Witnesses VAL O. BELT, M. A. KIDDIE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

